Re: How to recover data from a defective CDROM

On Wednesday 20 May 2009, Jonathan Ryshpan wrote:
My computer is no longer able to read a CDROM with some fairly valuable
data. I have been able to read this CDROM successfully in the past.

Inserting the CDROM into the drive produces this in /var/log/message:

May 20 14:31:05 localhost kernel: sr 2:0:0:0: [sr0] Result: hostbyte=DID_OK
driverbyte=DRIVER_SENSE,SUGGEST_OK May 20 14:31:05 localhost kernel: sr
2:0:0:0: [sr0] Sense Key : Hardware Error [current] May 20 14:31:05
localhost kernel: sr 2:0:0:0: [sr0] Add. Sense: Timeout on logical unit May
20 14:31:05 localhost kernel: end_request: I/O error, dev sr0, sector 0 May
20 14:31:05 localhost kernel: __ratelimit: 10 callbacks suppressed May 20
14:31:05 localhost kernel: Buffer I/O error on device sr0, logical block 0
May 20 14:33:02 localhost kernel: sr 2:0:0:0: [sr0] Result: hostbyte=DID_OK
driverbyte=DRIVER_SENSE,SUGGEST_OK May 20 14:33:02 localhost kernel: sr
2:0:0:0: [sr0] Sense Key : Hardware Error [current] May 20 14:33:02
localhost kernel: sr 2:0:0:0: [sr0] Add. Sense: Timeout on logical unit May
20 14:33:02 localhost kernel: end_request: I/O error, dev sr0, sector 0 May
20 14:33:02 localhost kernel: Buffer I/O error on device sr0, logical block
0 May 20 14:33:02 localhost kernel: Buffer I/O error on device sr0, logical
block 1 May 20 14:33:02 localhost kernel: Buffer I/O error on device sr0,
logical block 2 May 20 14:33:02 localhost kernel: Buffer I/O error on
device sr0, logical block 3

An attempt to get some data using cat fails:
# cat /dev/sr0
cat: /dev/sr0: Input/output error

Thanks - jon

Can this drive still read other cd's? Also, if the cd really is scratched,
there are treatments to restore them at your local Wally World I believe. In
a one time pinch, you could use a century old darkroom technique we used for
scratched negatives since long before my time, rub a bit of the grease from
the side of your nose into the scratch.

But I'd almost bet a new drive would read it as it is.

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Cheers, Gene
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Relevant Pages

  • Re: How to recover data from a defective CDROM
    ... An attempt to get some data using cat fails: ... a one time pinch, you could use a century old darkroom technique we used for ... the side of your nose into the scratch. ... grease didn't help. ...
    (Fedora)
  • Re: How to recover data from a defective CDROM
    ... An attempt to get some data using cat fails: ... In a one time pinch, you could use a century old darkroom ... bit of the grease from the side of your nose into the scratch. ...
    (Fedora)